Seed oil and seed oil byproducts of common purslane (Portulaca oleracea L.): A new insight to plant-based sources rich in omega-3 fatty acids

Abstract

In the present study, nutritional value, chemical composition and bioactive properties of purslane seeds, seed oils and seedcakes were examined. Data were analyzed by a one-way ANOVA, while means were compared with Tukey's HSD test. For seed oil extraction mechanical and ultrasound assisted methods were tested. Cold extraction methods (CE1 and CE2) resulted in higher oil yield (increased by 33.7% and 38.1%, respectively) comparing to hot extraction (HE) method. Seeds contained the highest amount of fats and energy (15.03 ± 0.06 g/100 g dry basis (db) and 459 ± 1 kcal/100 g db, respectively), while seedcakes from CE2 had the highest content in proteins and ash (31.20 ± 0.03 and 4.27 ± 0.06 g/100 g db, respectively). Seeds and seedcakes contained a balanced content of linoleic and α-linolenic acids (33.80-34.74% and 32.83-34.64%, respectively). HE and CE1 oils had slightly higher amounts of α-linolenic (39.67% and 39.57%, respectively) than linoleic acid (35.44% and 35.13%, respectively), whereas CE2 oils contained twice as much linoleic as αlinolenic acid (49.77% and 24.18%, respectively). In conclusion, the tested materials are good sources of omega-6 and omega-3 fatty acids and proteins, while extraction method affected oil yield and fatty acids composition of seed oils.

Mayten Tree Seed Oil: Nutritional Value Evaluation According to Antioxidant Capacity and Bioactive Properties

“…Rancimet 743 measures the stability oxidation of the oil, corresponds to the induction period, expressed in hours, and thiobarbituric acid reactive substances (TBARS) measure malondialdehyde (MDA) present in the sample. All analyses were determined according to the American Oil Chemists’ Society (AOCS) standard method [ 26 ], as described by Petropoulus et al (2020) [ 27 ].…”

Omega−3 Polyunsaturated Fatty Acids (PUFAs): Emerging Plant and Microbial Sources, Oxidative Stability, Bioavailability, and Health Benefits—A Review

“…Thus, purslane can serve as an affordable source of ALA. However, the high content of oxalic acid and nitrates in the leaves has limited its commercial exploitation for ALA [88].…”

Antimicrobial Properties, Cytotoxic Effects, and Fatty Acids Composition of Vegetable Oils from Purslane, Linseed, Luffa, and Pumpkin Seeds

“…Apart from the well-known and widely used vegetable oils, there are several minor seed oils which possess special features related to their chemical composition and bioactive properties [10,11]. Their unique characteristics are usually related with fatty acids composition, especially omega-3 fatty acids content [12,13], or specific bioactive compounds such as polyphenols or tocopherols that contribute to the observed antioxidant and bioactive properties [14,15].…”

“…However, the aerial plant parts may also contain high amounts of oxalic acid which is an antinutritional factor and may have severe effects in individuals with kidney problems [36]. Seeds and seed oils are not so commonly used and recent research highlighted their valuable properties associated with the unique chemical composition, especially the fatty acids profile [8,10], while they do not contain oxalic acid which enables their safe consumption [11,37]. Among the studied species luffa is the least known and is commonly used for its spongy flesh as a natural sponge, while other suggested uses include oil removal from waste water and oil spills [38] and biofuel production [39].…”